/*
 * Copyright (C) 2010 Graham Allan
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.strath.cis.grallan.findbugs.adaptiveranking.gui.sort;

import java.util.Comparator;

import edu.strath.cis.grallan.findbugs.adaptiveranking.AdaptiveRanker;
import edu.strath.cis.grallan.findbugs.adaptiveranking.lr.LearningRank;
import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.gui2.BugLeafNode;
import edu.umd.cs.findbugs.gui2.BugAspects.SortableValue;
import edu.umd.cs.findbugs.gui2.sort.AbstractSortable;

/**
 * @author Graham Allan (grallan@cis.strath.ac.uk)
 */
public class LearningValueSortable extends AbstractSortable {

	private final AdaptiveRanker<LearningRank> learningValueRanker;

	public LearningValueSortable(String prettyName, AdaptiveRanker<LearningRank> learningModel) {
		super(prettyName);
		this.learningValueRanker = learningModel;
	}

	@Override
	public String getFrom(BugInstance bug) {
		LearningRank learningRank = learningValueRanker.rankingComputed() ? learningValueRanker.getRankFor(bug) : null;
		if (learningRank != null) {
			double bugLearningValue = learningRank.rank();
			return Double.toString(bugLearningValue);
		} else {
			return Double.toString(0.0d);
		}
	}

	@Override
	public int compare(SortableValue one, SortableValue two) {
		try {
			double oneValue = Double.parseDouble(one.value);
			double twoValue = Double.parseDouble(two.value);
			return Double.compare(twoValue, oneValue); // Descending order
		} catch (NumberFormatException nfe) {
			return 0;
		}
	}

	@Override
	public String formatValue(String value) {
		Double dValue = Double.parseDouble(value);
		return String.format("Learning Value [%.6f]", dValue);
	}

	private final Comparator<BugLeafNode> bugLeafNodeComparator = new BugLeafPriorityComparator();

	@Override
	public Comparator<BugLeafNode> getBugLeafNodeComparator() {
		return bugLeafNodeComparator;
	}

}
